Excavator crane



April 26,1927.

R. LJUNGKULL EXGAVATOR CRANE Y Filed April 15. 1926 INVENTok.

/Pa/ F Jawa/fau.

A T TORNE YJ Patented Apr. 26, i927.

UNITED STATES ROLF LJ'UNGKULL, 0F ML'WAUKEE, W'SGGNSEN, ASSEGNOB T0 HARNSC-FEGER CORPORATION, 0F MILWAUXSEE, VTISCONSN, A CORPORATON.

EXCAVATOR CRANE.

Application filed April 15, 1926. Serial No. l-Gde.

This invention relates to improvements in excavator cranes. and more particularly to the means ttor adjusting the gudgeon pin thereof and locking the same in adjusted position.

One ot the objects of the present invention is to provide means of the character referred to which is locked or held in adjusted position without the use of the setting bolts or screws such as have been used heretofore for this purpose., and which may be readily adjusted to take up on the gudgeon pin without the use ot' any special tools or the necessity of removing any such parts as the setting bolts or screws referred to.

Another object is to provide improved means of the character referred to which has advantages over such means used heretorore as regards accessibility, ease of adjustinent, and simplicity of construction.

ln the drawings l Figure l is a sectional View taken through the center o an excavator crane of the fullrevolving type;

Fig. 2 is a section on line 2 2 of Fig. l;

Fig. 3 is a top plan View of one of the parts; and

Fig. l is a front elevational view of Fig. 3.

In Fig. l are shown the revolvable frame 1 supported upon the usual rollers 2 for 'rotation with respect to the gear 3 lixed in the usual manner to the tractor trame (not shown) the gear being provided with a track et tor the rollers. The gudgeon pin 5 is a hollow, cylindrical member passing through the center oi gear 3 and the axis of rotation ot trame l, the pin being provided at the lower end thereof with a head 6 eountersunk in the underside of gear 3, as shown. The pin 5 is fixed against rotation with respect to gear 3 by a key 7 or other suitable means. The usual drive shai't 8 extends loosely through suitable bushings 9 and 10 litted in the upper and lower ends of pin 5, the driving gear 1l which is connected to the prime mover for operating the machine being arranged on the upper end of sha-tt 8 and locked against rotary movement with respect thereto by any suitable means indicated generally by reference numeral l2. A suitable bushing ll may be fitted on the upper end ol shaft 8 between the saine and gear 1l, as shown. `The drive shaft 3 is connected to the usual transmission mechanism :tor the tractor through a beveled gear 13 arranged upon and keyed to the lower end of the shaft. The beveled gear is held by a ring or member 1T provided with an inwardly entending flange 18 and lugs i9 which receive bolts 2O by which the ring is liXed to the underside ot gear 3, flange 18 providing a seat for the head or flange 2l at the upper end oi the hub ot' gear i3. shown in Fig. l, the lower end oit pin 5 seats upon flange 21. bushing l() being provided at its'lower end with an outwardly extending flange l0 interposed between these parts to provide a thrust bearing at this point. For the purpose oit supporting shai't 3 against downward axial movement, the saine may be provided with a shoulder 16 arranged to seat upon the inner edge oi flange 2l, as shown. F rom the foregoing it will be seen that the ring or member 1T supports pinV 5, gear 13 and shatt 3, as well as gear ll 'which seats upon the upper end ot pin 5.

For the purpose ot holding in place the hey (not shown) by which gear 13 is fixed to the lower end ot shaft 8, a plate 14 may be lined to the lower end oi' the latter with its edge extending slightly beyond the same to provide a seat upon which the lower end ot this lrey may'rest.

A. gear 22 is arranged loosely on pin 5 between 'trame l. and gear 3 and rests upon the latter gear being provided on its underside with cam grooves 23 and forming part of a steering` gear of the general type described and elaiined iu copending application bearing Serial Number 300, .tiled auuary 26., 1925 bushing 2l is litted upon pin 5 between the saine and 'fri ne l to permit tree rotation ot' the latterwrih respect to the pin.

A lock nut 2f s threaded upon the upper and of pin 5 and provided with vertical grooves 26 formed in its outer edge. A loclring member 2T is loosely litted upon the upper threaded end ot pin 5 and is provided with downward.lf-` er-ztending and diametrically arranged lugs 23 adapted to lit into a pair of grooves 2G as more clearly shown in Fig. 2, the member being' 'further provided at its inner edge \.vith iu.vardlgv extending lugs 29 arranged to fit into diametrically arranged grooves 29 termed in the threaded end ot pin 5 and extending longitudinally thereof.

is shown in Fig. l, the upper end ot bush ing 24 max7 extend ,outwardly between'lrame .otheraneansis removerhand. member; per- 1 and nut 25 to provide a ithrnst bearing vrnitted to drop into `locking position. as

between these parts. shown-1n Fig. l, luge Q9 loelnnglr member llVhen locking member 27 is in locking po- 27 against rotary movement with reepeet to 5 'sitioin the"threaded end ot pin 5 extends pin o While lugs loeknilitr against ro 7a Slightlv above the latter anamonnt at least tarj,r movementwith respect' to the member, equal to the length ot the downwardlyv eff` whereliwif' the. nut is locked 1n adpisted positendinglugs 28, the arrangement being:T such tion against rotar)v movement with respect to that upon upward axial movementot memthe pin. l

fl ber 27, lugs 2S will be diseiigaged from A preterred embodiment of the inrention 'a ggrooves 2G to permit adjustment ot not Q5. has-beenshown ahdfdesemherhhntoi:retiree lWhile lugs iQ-will'stillfmaintain theieposif` rarirnis `changes in the einefsliapel and van tion inelotsfll. The advantage ot" this eon- :rangementot the partemayi beia,e,pterl will struction is that gin placing member? back ont'departingtrom lt,he'p1r 11. ot thewinrenif* in looked position, it is 1nerelT necessary to t-lon onthe Seope ot the elanns. l en adinet nnteo that apairot diametreally ThelnVGIlIOIlCllllefll 1:arranged groovesiQG are eoineidentwwith lugs In anfeioavatorlerane. `etthe oharaa -ter 28,:sinee lugs'Qf) willfalways be interloeked reterred-to, theeomblnatmnwlth awrelativervvitlrgroovee.39 inthe upper'threaded end ly lixed Lgear affrainerarrangerhabove said To V*Ofpin 5 wgearwandwsnpported for rotanyiT anovexnent f `Asl-is wellfknown, thefgudgeon pin pro- Awith'respect:'theretogof a hollowxeyllndrloal iv-ides-fafpivotiabont which t-heitrameil and pin providedat its lower end wit-hva head L1nafshinerrLmounted thereon Vmay revolve, andextendingupwardly.through the'geenter .and hol'dthe tra-me.eentrailylwith respect Iotisaidgear, and the:indent/rotation-otrsaid ilto gear ifiaind thetraetortrame to which the z-frame.v said pin beine#l thaeadedi atzitsfnpper 10U latten is-ktixed. "'lliegndgreon pin alsovproend and provided therein with a longitu- Hvidesr abearing for drive/shaft 8f and holds @dinallyextending grooveaannt threaded uptbe `ripper part of the machineincluding 4on saldi endvandaotng'npon t-lieu}pperssicle fraanefl and the .mechanism mounted thereon of said tranne to Vhold thelatterifagainstnax- 2" :frombvertrmning .should theeenterot grav- `ial movementmitin-respect;toisaidifgeaigisaid W5 -ityot-theseparts fall-beyondwhatistermed nut:being'providediatfitsfoutenedgemvith a the swing circle. plurality ot longitudinal1y` eriteirding' In theffeonetrnetion nee-d:heretofore, the 'ierooves, .andfaloeking @member"ialimanged ynppel1 end of the gndggeon` pin hasbeen ]L n"`oll0osel,7 mponthefthreaded end ofLsaid `pin @vided with a headsimilartoelieadf, and above said nnt and restinginpon` thel-liatteigloo lthe lower end 'of the pinft'hrez'lded to` receiveV saidmemberbein'g poovidediatits inner edge n.suitablenloek mitaaikeeper plate beingr einwith an inwardly extending lug engaging iployed-` to hold the nut iii-adjusted position. the groove in said threaded ends and iat its' This keeper plate hasabeen .iseeuredto the,f onter edge'witha 'downwardljy"extendnglng 140 innfderside otgear 3 by `means ot ybolts or :arranged in one io't saidg'rooves .with wl'iieh 105 i-iserews, and has beenarranged to engage the the nntlisrprovided,'the'arrangement:being :outer edge ol' the lock nnt torihold the same e such' thatlnponnpwardnaxial `inmfement of i-n its'position ot adjustment. =In this coneaid washer npon said` pinisaiiddownwardlyv strnetionyit has beenneeessary'in readjustextending' lut; iswlisenf-agedfrom saidwnnt 45 ing the partsin -orderfti'itake up on the to permit. adjnstmentof thelatterWhilesaid H0 gindgeon pin. to get under the machine and Viinwardly:exteaidiingr lngnmaintains itsrrlockremove the keeper plate by "irst removing fing', engagement iwith therthreadedi endl ot the bolts orscrews holding the same in posii `Said pin. tion,` and to thenturn the nuts to the desired x 2.1111- an i-exeavatorecrane of the :character 59 position ot adjustment andto replace the fdeseribed. the Yoonribination A`withav :lowerlll5 keelneriplate and the holdingA bolt.;v orscrews `trame and annpper :frame supported theretherefor. bv 1 for v rotation with respects theretowa pin In the herein described improved eonstrneextendingthronghisaid frames andaholding ttiomit will be seen that the parts are mneh `Said nppermtrame `in `operativerelation-With ifi-7i more accessible than in the eonfltrnetion used lreepect to the lower trame for `rotation "WU heretofore and that there are yno boltsl or aboutanwaxierelatively fixed -with respect :screws to be Vremoved in readjnstinfr the thereto. said pin beinenprovided.at one end gndgjeon nut. VIn making; a readjnetment, Athereofwith a heafd engaging the ontereide the member 27 is inerehr li'lted 'from nnt ot' one ot saidltrames, the other endiol said i5 y,until lugs 2S arewithdrawn from grooves tpinheingf threaded and extending `bejv'ond Qtttbe member being held in this position the other frame, and an adjusting` mit inany manner sueltas byyplacing a stiel: orfthrended aipon said `latter end andengafring Hnn-italole tool between. the latter and mit. `Nnt Saidiotherfframe torwholding said pin-and 26 may then be rotated to take up on'the tramesin assembled relation avliilerpermit "6E llld'eon Pill i5, after which the stick or, tingwfreerotary movement ofisaid -llpper 130 frame, of a locking member arranged loosely on Said threaded end and interlocking with the latter and said nut whereby the latter is looked in adjusted position on said pin, said member being movable out of interlocking relation with said nut upon axial movemont away from the latter.

3. 1n an excavator crane of the character described, upper and lower frames, a hollow cylindrical pin extending upwardly through said frames and proided at its lower end with a head engaging the underside of the lower trame, the upper end ot said pin being threaded and extending above the upper frame, Said upper 'frame being freely rotatable about said pin, a drive .shaft extending loosely through said pin and provided at its upper end with a driving gear lxed thereto in a plane spaced vertically above the threaded end of said pinT an adjusting nut threaded upon said latter end and engaging the upper frame to hold said frames in operative relation, and a looking member arranged loosely upon Said threaded end oit said pin "for axial movement along the same in the space provided between said latter end and Said driving gear, said member being adapted to seat upon said nut and to interlock when so seated with said tl1readed end and said nut, said member being movable out of interlocking relation with said nut upon upward axial movement away from the latter.

ln Witness Whereoil I hereto aliix my signature.

ROLF LJ UNGKULL. 

